.mail-content {
    // z-index: -1;
    z-index: 1;
    position: relative;
}
.mail-inner-row {
    height: 40px;
    width: 100px;
    position: relative;
    padding: 0px;

    .input-group {
        position: relative;

        input {
            // margin: 0;
            border: 0;
            outline: none;
            border-bottom: 1px solid #ccc;
            border-radius: 0;
            background-color: #f9f9f9;
            font-family: verdana, sans-serif;
            font-size: 14px;
            height: 40px;
            margin-left: 0px !important;
        }

        .input-group-addon {
            z-index: 1;
            border-radius: 0;
            min-width: 100px;
            background-color: #f5f5f5;
            border: 0;
            border-bottom: 1px solid #ccc;
            border-right: 1px solid #ccc;
            text-align: left;
            padding-left: 12px;
            color: #aaa;
            font-weight: 700;
            font-size: 14px;
            line-height: 40px;
            height: 40px;
        }
    }

    .mail_error_btn {
        z-index: 1000;
        position: absolute;
        font-size: 12px;
        background-color: #f5f5f5;
        border: 0px;
        outline: 0px;
        opacity: 0.9;
        padding: 0px 10px;
        right: 0px;
        width: 123px;
        text-align: center;
        font-size: 14px;
        border-left: 1px solid #ccc;
        cursor: pointer;
    }

    button:focus {
        background-color: #e74c3c;
    }

    button:hover {
        opacity: 1;
    }

    .upload_file_btn {
        z-index: 1000;
        top: 6px;
        padding: 4px;
        font-size: 12px;
        background-color: #e74c3c;
        border: 0px;
        outline: 0px;
        opacity: 0.9;
        font-weight: 700;
    }

    button.upload_file_btn:focus {
        background-color: #e74c3c;
    }

    button.upload_file_btn:focus {
        opacity: 1;
    }

    .fa-exclamation-triangle {
        height: 25px;
        width: 25px;
    }
    .domain-input {
        width: 70%;
        line-height: 39px;
        display: inline-block;
        border-left: 1px solid rgb(204, 204, 204);
        border-bottom: 1px solid rgb(204, 204, 204);
        margin: 0;
        padding: 0;
        padding-left: 5px;
    }
    .email-text {
        position: absolute;
        line-height: 39px;
        right: 0;
        color: #495057;
        font-size: 14px;
        padding-right: 5px;
    }

    .border-left-1 {
        border-left: 1px solid #ccc !important;
    }
}
.input-group > .form-control:focus,
.input-group > .form-floating:focus-within,
.input-group > .form-select:focus {
    z-index: inherit !important;
}
